PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 95%

This chart shows the annual and cumulative numbers of protein sequences in released PDB structures. The chart can be viewed for a few different levels of sequence identity since the beginning of the PDB archive. The cumulative bars represent the growth in unique protein sequences (number of polymeric entities) across history. The yearly bars (dark blue) tell how many new protein sequences were added in a certain year.

Note: The total number of sequence clusters in the statistics table is linked to the sequence cluster group search result page. There is a default precision threshold in calculating the numbers for performance balance. So the statistics count may have a slight discrepancy compared to the actual non-redundant group search result when the result count approaches or goes above 10,000. The group search result page provides an accurate count. The statistics page provides the trend.

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Sequence cluster level:

YearNumber of New Protein SequencesTotal Number of Protein Sequences
19761313
19771427
1978330
1979636
1980339
1981948
19821866
19831076
19841187
19851097
19869106
198710116
198824140
198945185
199047232
199155287
199266353
1993240593
19944851,078
19953731,451
19964151,866
19975762,442
19987683,210
19999654,175
200010795,254
200111136,367
200211817,548
200316769,224
2004228111,505
2005254314,048
2006288616,934
2007326920,203
2008303623,239
2009316726,406
2010317029,576
2011298032,556
2012316335,719
2013347239,191
2014424543,436
2015357547,011
2016413651,147
2017453955,686
2018424159,927
2019480164,728
2020578270,510
2021526475,774
2022640582,179
2023613788,316
2024622994,545
2025260497,149